change docker repo to agrsga

To push the docker image from GeoscienceAustralia fork, I have created a new DockerHub account named agrsga.

Author: umma-zannat

.github/workflows/docker.yml

@@ -30,4 +30,4 @@ jobs:
         with:
           context: .
           push: true
-          tags: icsm/dynadjust:latest
+          tags: agrsga/dynadjust:latest